HD6412350 Hitachi, HD6412350 Datasheet - Page 271

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

For details, see section 7.3.4, DMA Control Register (DMACR).
Figure 7-16 shows an example of the setting procedure for block transfer mode.
and transfer destination
Set number of transfers
Block transfer mode
Set transfer source
Read DMABCRL
Set DMABCRH
Set DMABCRL
Block transfer
mode setting
Set DMACR
addresses
Figure 7-16 Example of Block Transfer Mode Setting Procedure
[1]
[2]
[3]
[4]
[5]
[6]
[1] Set each bit in DMABCRH.
[2] Set the transfer source address in MARA, and
[3] Set the block size in both ETCRAH and
[4] Set each bit in DMACRA and DMACRB.
[5] Read DTE = 0 and DTME = 0 in DMABCRL.
[6] Set each bit in DMABCRL.
• Set the FAE bit to 1 to select full address
• Specify enabling or disabling of internal
the transfer destination address in MARB.
ETCRAL. Set the number of transfers in
ETCRB.
• Set the transfer data size with the DTSZ bit.
• Specify whether MARA is to be incremented,
• Set the BLKE bit to 1 to select block transfer
• Specify whether the transfer source or the
• Specify whether MARB is to be incremented,
• Select the activation source with bits DTF3 to
• Specify enabling or disabling of transfer end
• Set both the DTME bit and the DTE bit to 1 to
mode.
interrupt clearing with the DTA bit.
decremented, or fixed, with the SAID and
SAIDE bits.
mode.
transfer destination is a block area with the
BLKDIR bit.
decremented, or fixed, with the DAID and
DAIDE bits.
DTF0.
interrupts to the CPU with the DTIE bit.
enable transfer.
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